Light & Compact Packs exceptionally small for easy travel. Thick and Stable Four-inch (10 cm) thick, baffled air chamber for stability, loft and custom support. Soft Synthetic-fill top and a brushed exterior provide next-to-skin comfort. Removable cover is machine washable, nonslip fabric keeps pillow in place. Thoughtful Shape Precise shape nestles into the hood of your sleeping bag and is available in two sizes. Sustainable Made of partially recycled fabric so it supports your head and mother nature. Therm-a-Rest Air Head Pillow